I am fighting with the bitcoin core application and after a lot of searching, I now come to believe that the problem lies in my lack of understanding of how snaps work. On my system, I have a folder /u which has all the mount points of my external drives (but not only). One of them is bigdata2 (a 5TB drive) with a folder .bitcoin which has all the bitcoin data from a previous install of bitcoin core (not a snap). The first outpoint I noticed was that the BC Core snap could not see my folder /u - it was just missing from the file selection dialog. That first sent me on a quest to all bitcoin fori (forums?) where I got the idea to suspect snaps. And one test confirmed that suspicion: I installed krita and it also does not see my /u folder. What is it that I don’t understand and have to read the manual about? Thanks - Merlin
CLI applications can only accessed certain paths (those private to the snap); the path access can be enhanced by connecting certain interfaces such as “home” to provide access to the home directory and “removable-media” to access /media and /mnt. You can try and bind mount or double mount to those locations if this snap makes use of any of those interfaces.